Control for movable rail

1. A covering for an architectural opening, said covering comprising:

a movable rail;

a covering material coupled to said movable rail;

an elongated rod provided in operative association with said movable rail, said elongated rod rotatable about a rotational axis;

a spool coupled to said elongated rod for rotation therewith;

a cable configured to wind around or unwind from said spool as said spool rotates with said elongated rod with movement of said movable rail; and

a lock provided on said movable rail, said lock comprising:

a rotary component coupled to said elongated rod for rotation therewith;

an engagement feature configured to be moved in an axial direction of said elongated rod along a linear path relative to said rotary component between a first axial position and a second axial position; and

a biasing element configured to provide a biasing force that is applied against said engagement feature in the axial direction;

wherein:

when said engagement feature is disposed at said first axial position, said engagement feature is engaged with said rotary component to prevent rotation of said rotary component; and

when said engagement feature is disposed at said second axial position, said engagement feature is disengaged from said rotary component to allow said rotary component to rotate with said elongated rod relative to said engagement feature.

2. The covering of claim 1 , further comprising a movable element configured to be moved in the axial direction of said elongated rod relative to said rotary component, said engagement feature being provided in operative association with said movable element such that said engagement feature is moved along the linear path with movement of said movable element in the axial direction.

3. The covering of claim 2 , wherein:

said movable element comprises a movable tab extending outwardly from said movable rail; and

said movable tab is configured to be moved relative to said movable rail in the axial direction.

4. The covering of claim 3 , further comprising a fixed tab extending outwardly from said movable rail at a location spaced apart from said movable tab.

5. The covering of claim 4 , wherein:

said movable tab is configured to be moved axially towards said fixed tab to move said engagement feature from said first axial position to said second axial position; and

said movable tab is configured to be moved axially away from said fixed tab to move said engagement feature from said second axial position to said first axial position.

6. The covering of claim 3 , wherein:

said lock further comprises a housing fixed in position relative to said movable rail; and

said movable tab is slidably received within a track defined by a portion of said housing to allow said movable tab to be moved in the axial direction along the exterior of said movable rail.

7. The covering of claim 1 , wherein said biasing element comprises a biasing spring.

8. The covering of claim 1 , wherein:

said engagement feature is configured to be moved along said linear path in the axial direction towards said second axial position against the biasing force provided by said biasing element via user interaction with a movable element provided in operative associated with said engagement feature; and

upon release of said movable element, the biasing force provided by said biasing spring operates to move said engagement feature along the linear path in the axial direction towards said first axial position without further user interaction.

9. A covering for an architectural opening, said covering comprising:

a movable rail;

a covering material coupled to said movable rail;

an elongated rod provided in operative association with said movable rail, said elongated rod rotatable about a rotational axis;

a spool coupled to said elongated rod for rotation therewith;

a cable configured to wind around or unwind from said spool as said spool rotates with said elongated rod with movement of said movable rail; and

a lock provided on said movable rail, said lock comprising:

a first tab extending outwardly from said movable rail; and

a second tab extending from said movable rail at a location spaced apart axially from said first tab, said second tab configured to be moved in a first direction towards said first tab and in a second direction away from said first tab;

wherein:

movement of said second tab in one of said first direction or said second direction results in engagement of said lock with said elongated rod to prevent rotation of said elongated rod; and

movement of said second tab in the other of said first direction or said second direction results in disengagement of said lock from said elongated rod to allow said elongated rod to rotate relative to said lock.

10. The covering of claim 9 , wherein:

the first and second directions correspond to opposed directions along an axial direction of said elongated rod; and

said second tab is movable relative to said first tab along a linear path extending in the axial direction.

11. The covering of claim 9 , further comprising:

a rotary component coupled to said elongated rod for rotation therewith; and

an engagement feature provided in operative association with said second tab;

wherein:

movement of said second tab in said one of said first direction or said second direction results in said engagement feature being engaged with said rotary component to prevent rotation of said rotary component and said elongated rod; and

movement of said second tab in the other of said first direction or said second direction results in said engagement feature being disengaged from said rotary component to allow said rotary component to rotate with said elongated rod relative to said engagement feature.

12. The covering of claim 11 , wherein, when said second tab is moved towards or away from said first tab, said engagement feature moves with said second tab along a linear path relative to said rotary component along an axial direction of said elongated rod.

13. The covering of claim 9 , wherein:

said lock further comprises a housing; and

said second tab is slidably received within a track defined by a portion of said housing to allow said second tab to be moved relative to said first tab.

14. The covering of claim 9 , wherein said first tab is fixed in position relative to said second tab.

15. The covering of claim 9 , further comprising a biasing spring provided in operative association with said second tab such that said biasing spring applies a biasing force against said second tab.

16. The covering of claim 15 , wherein:

said second tab is configured to be moved in the other of said first direction or said second direction against the biasing force applied by said biasing spring via user interaction to disengage said lock; and

upon release of said second tab, the biasing force applied by said biasing spring against said second tab operates to move said second tab in said one of said first direction or said second direction to engage said lock.

17. A covering for an architectural opening, said covering comprising:

a movable rail;

a covering material coupled to said movable rail;

an elongated rod provided in operative association with said movable rail, said elongated rod rotatable about a rotational axis;

a spool coupled to said elongated rod for rotation therewith;

a cable configured to wind around or unwind from said spool as said spool rotates with said elongated rod with movement of said movable rail; and

a lock provided on said movable rail, said lock comprising:

a rotary component coupled to said elongated rod for rotation therewith;

a housing fixed in position relative to said movable rail;

a movable element slidably received within a track defined by a portion of said housing to allow said movable element to be moved in an axial direction of said elongated rod along an exterior of said movable rail; and

an engagement feature provided in operative association with said movable element such that said engagement feature is movable along a linear path relative to said rotary component between a first axial position and a second axial position with movement of said movable element in the axial direction;

wherein:

when said engagement feature is disposed at said first axial position, said engagement feature is engaged with said rotary component to prevent rotation of said rotary component; and

when said engagement feature is disposed at said second axial position, said engagement feature is disengaged from said rotary component to allow said rotary component to rotate with said elongated rod relative to said engagement feature.

18. The covering of claim 17 , wherein:

said movable element comprises a movable tab extending outwardly from said movable rail; and

said movable tab is configured to be moved relative to said movable rail in the axial direction.

19. The covering of claim 18 , further comprising a fixed tab extending outwardly from said movable rail at a location spaced apart from said movable tab.

20. The covering of claim 19 , wherein:

said movable tab is configured to be moved axially towards said fixed tab to move said engagement feature from said first axial position to said second axial position; and

said movable tab is configured to be moved axially away from said fixed tab to move said engagement feature from said second axial position to said first axial position.

21. The covering of claim 17 , further comprising a biasing element configured to provide a biasing force that is applied against said engagement feature in the axial direction.

22. The covering of claim 21 , wherein:

said engagement feature is configured to be moved along said linear path in the axial direction towards said second axial position against the biasing force provided by said biasing element via user interaction with a movable element provided in operative associated with said engagement feature; and

upon release of said movable element, the biasing force provided by said biasing spring operates to move said engagement feature along the linear path in the axial direction towards said first axial position without further user interaction.